Scalebar attribute IMAGETYPE listed values are not extracted from the widget.php
file.
These values are: [GIF|PNG|PNG24|JPEG|WBMP|PDF|SWF]

Reason being is that the code declaration of these listed values is different
than what how other attribute listed values are defined.

Is this a problem with the code structure of doc builder or the widget itself?

Can the widget code be modified slightly to declare the IMAGETYPE value
consistent with other value declaration?

Let me know so I know who to assign it to.